UNCONJUGATED ESTRIOL (E3)
Types
- Unconjugated Estriol , the biologically active form of estriol, is classified as a weak , short acting estrogen due to its low affinity for the estrogen receptor and its high clearange. It is the weakest of the three major estrogens and is made in large quantities during pregnancy and has potential protective properties against the producti...
Description
- 14th weeks 0.61 – 1.74 ng/ml
- 15th weeks 0.86 – 2.09 ng/ml
- 16th weeks 1.11 – 2.50 ng/ml
- 17th weeks 1.37 – 2.96 ng/ml
- 18th weeks 1.63 – 3.48 ng/ml
- 19th weeks 1.86 – 4.02 ng/ml
- 20th weeks 2.07 – 4.57 ng/ml
- 21st weeks 1.8 – 9.61 ng/ml
- 22nd weeks 2.0 – 10.61 ng/ml
When to get Tested
- To Monitor high risk pregnancy
- As a component of second trimester maternal screening
Elevated Level
- Increases throughout normal pregnancy
Decreased Level
- Trisomy 21( Downs Syndrome)
- Trisomy 18 ( Edwards Syndrome)
- Foetal Distress
- Foetal anencephaly
- Placental sulfatase deficiency
- Foetal death
